How Does a Touchscreen Know Where You're Tapping?

Imagine your phone is like a giant cookie. When you tap it, it feels the little bumps from your finger and knows exactly where you touched. It uses tiny invisible dots all over its screen, like a map, to figure out where you're tapping, even if your finger isn't perfectly clean or clear.

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Examples

Your finger is like a little magnet on your phone's screen.
A smudgy finger still tells the screen where you're tapping.
Even if you tap multiple times at once, your phone knows exactly where each tap landed.

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Categories: Technology · touchscreen· mobile technology· sensors